Why do Avatars Display both Mine another Another Accts Avatar for different Apps/Notifications?

[Windows Central Question]

Avatars Display both Mine another Another Acct;s Avatar for different Apps/Notifications

Ever since the new Xbox One Experience release, the avatar that displays for different Apps and Notifications is mixed up between mine and another acct. I"ve deleted the other acct yet that avatar still displays for those certain apps/notifications.

Example:
Going to "My Profile" displays My Avatar.
Selecting an Acct to log into displays My Avatar.
When I log in, the "Headset Assigned" notification is the Other Avatar.
Star Wars Battlefront displays Other Avatar for myself and to the public.
YouTube and Netflix App is the Other Avatar.